Hi Lee.. I think the quality of the kit you buy makes a massive difference. I read that some cheap kits from china were really poor. All the cables were screened and the connectors were all water proof. They were really well made. I tested the bulb cut off pattern at night by having one HID and one halogen and a large piece of board...they were almost identical. I also got a mate to drive in front of me once they were fitted and he said there was no glare at all. I don't know if the reflector type headlights cause more issues than our projector type which does have the inbuilt bulb screen/cut off section? What was dangerous was driving at night with halogens............